"This is easy to use cell counter from invitrogen. This equipment has great precision that gives accurate cell counting ability. It is a great time consumer. This machine also will gives you data for cell viability."

"This instrument is from Invitrogen. When we ordered it many years ago in a promotion, it came with the dyes. So it was worth the price we paid. This device is very easy to use. It is a lot easier and more convenient than counting by microscope."

"The Invitrogen Countess has been a good addition to our laboratory. We function using the staff-assisted, investigator-initiated model which brings researchers of a wide variety of skill levels to our facility. It is very easy to teach even an undergrad to use this instrument reliably, and it standardizes their results such that they will get the same cell count as your most seasoned post doc. Particularly in siRNA screening applications where the transfection quality is so heavily cell density specific, standardization of cell populations is absolutely essential. This is a low cost item that I would recommend to any lab that does a large amount of cell culture."

The Countess® automated cell counter provides fast, easy and accurate cell counting without using a hemocytometer, eliminating the tedium and subjectivity of manual cell counting forever. More automated counting with the Invitrogen Countess cell counter frees up your time, reduces eye strain and minimizes subjective judgments that can lead to error.

Invitrogen Countess cell counter counts and calculates viability in 30 seconds. The Countess includes dilution calculator. No set-up, no clean-up, no maintenance required. Save your data to a USB drive. 50 counting slides, trypan blue and a USB drive is included with your order. More information is available when you navigate to the Invitrogen Countess webpage.